How to Benchmark Code Execution Times on Intel IA-32 and IA-64 ...

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<strong>How</strong> <strong>to</strong> <strong>Benchmark</strong> <strong>Code</strong> <strong>Execution</strong> <strong>Times</strong> on Intel ® IA-32 and IA-64 Instruction Set Architectures loop_size:995 >>>> variance(cycles): 0; max_deviation: 0 ;min time: 2216 loop_size:996 >>>> variance(cycles): 28; max_deviation: 4 ;min time: 2216 loop_size:997 >>>> variance(cycles): 0; max_deviation: 112 ;min time: 2216 loop_size:998 >>>> variance(cycles): 28; max_deviation: 116 ;min time: 2220 loop_size:999 >>>> variance(cycles): 0; max_deviation: 0 ;min time: 2224 <strong>to</strong>tal number of spurious min values = 0 <strong>to</strong>tal variance = 1 absolute max deviation = 220 variance of variances = 2 variance of minimum values = 335757 With this method we achieved results as good as the previous ones. The only difference is the absolute maximum deviation that here is slightly higher; this does not affect the quality of the method from a benchmarking perspective. For completeness, the following graphs present behaviors of the variance and the minimum value. Figure 9. Variance Behavior Graph 9 graph9 2500 2000 clock cycles 1500 1000 min value 500 0 1 52 103 154 205 256 307 358 409 460 511 562 613 664 715 766 817 868 919 970 ensembles 28
<strong>How</strong> <strong>to</strong> <strong>Benchmark</strong> <strong>Code</strong> <strong>Execution</strong> <strong>Times</strong> on Intel ® IA-32 and IA-64 Instruction Set Architectures Figure 10. Variance Behavior Graph 10 graph10 clock cycles 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 0 100 200 300 400 500 600 ensembles variance 29
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